EP 1231567 A2 20020814 - Moiré artifact removal method and apparatus
Title (en)
Moiré artifact removal method and apparatus
Title (de)
Verfahren und Vorrichtung zur Eliminierung von Moiré-Artefakten
Title (fr)
Méthode et dispositif d'élimination d'artefacts de moiré
Publication
Application
Priority
US 76612201 A 20010118
Abstract (en)
A technique is provided that identifies screen and non-screen regions of a projected or displayed image to smooth and selectively remove moiré from the screen regions while maintaining sharpness in the non-screen regions. Each pixel in the image is classified as a screen or non-screen pixel and then pixels in a predetermined surrounding area of each pixel are examined to check the classification of that pixel. A low pass filter is applied to pixels in the image, such that, when the low pass filter is applied, a center of the low pass filter is selectively shifted relative to a current pixel based on the examination.
IPC 1-7
IPC 8 full level
G06T 5/00 (2006.01); H04N 5/21 (2006.01); G06T 5/20 (2006.01); G06T 7/40 (2006.01); H04N 1/409 (2006.01); H04N 5/74 (2006.01); H04N 17/00 (2006.01)
CPC (source: EP KR US)
G06T 5/20 (2013.01 - EP US); G06T 5/75 (2024.01 - EP US); H04N 5/74 (2013.01 - EP KR US); H04N 9/3179 (2013.01 - EP US); H04N 5/21 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
US 2002094128 A1 20020718; US 6879733 B2 20050412; CN 1286063 C 20061122; CN 1366270 A 20020828; EP 1231567 A2 20020814; EP 1231567 A3 20030827; EP 1231567 B1 20130313; JP 2002259964 A 20020913; JP 4123781 B2 20080723; KR 100521963 B1 20051014; KR 20020061495 A 20020724
DOCDB simple family (application)
US 76612201 A 20010118; CN 02102401 A 20020118; EP 02001353 A 20020118; JP 2002010697 A 20020118; KR 20010087970 A 20011229